Angle attachment for dental engines



(No Model.) E. FLEURY 8u A. G. GOODMAN.

ANGLE ATTACHMENT EOE DENTAL ENGINES.

Patented Aug. 26, 1890.

a J a w J MIM" . w .X e W UNITED STATES PATENT OFFICE.

FRANK FLEURY AND ALBERT G. GOODMAN, OF CHICAGO, ILLINOIS.

ANGLE ATTACHMENT FOR DENTAL ENGINES.

SPECIFICATION forming part of Letters Patent No. 435,138, dated August26, 1890. Application filed January 25, 1890. Serial No. 338,043. (Nomodel.)

To allwhom it may concern.-

Be it known that we, FRANK FLEURY and ALBERT G. GOODMAN, citizens of theUnited States, residing at Chicago, in the county of Cook and State ofIllinois, have invented certain new and useful Improvements in AngleAttachments for Dental Engines, of which the following is aspecification.

Our invention relates Io certain iu1prove- Inents in dental engines,whereby they are adapted for 'use to'operate a tool in a direction atright angles to the flexible rotary shaft; and the invention consists ina construct-ion whereby the rotary motion of the shaft is converted intoa right-angled reciprocating motion of the tool, which may be a plugger,file, saw, or emery strip. To attain the object above set forth, weprovide the hand-piece at its outer end with a head-block having waystherein extending at right angles to the handpiece, in which ways areciprocatin g tool-stock is moved by nicans of a disk and pin, saiddisk being secured on the end of a revolving shaft, and the pin beingprojected into a slot in the lower surface of the tool-stock, said slotextending in a direction at right angles to the direction of motion ofsaid stock.

In the accompanying drawings, Figure l is a front elevation of thehand-piece, particularly intended to show the head-block and thetool-stock in the ways thereof. Fig. 2 is an elevation partly in sectionfrom the same view point as Fig. l. Fig. 3 is a sectional elevation online 3 of Fig. l and at right angles to Fig. 2. Fig. A is also asectional elevation on the same line as Fig. 3, but showing thetool-stock in a different position, Fig. 5 is a plan View of thecrank-wheel, and Fig. (i is a plan view of the hand-piece with thetoolstock removed.

In the drawings, A represents the handpiece, which may be of the usualform, except that at its outer end it is provided with the head-block B,which will preferably be removable, and for this purpose we have shownthe hand-piece A and head-block B with the mating-threads a Z),respectively. The headblock has the ways C therein extending at rightangles to the hand-piece, and within said ways a tool-stock D is placed,said toolstock having a threaded aperture d to receive a tool-such asthe plugger E-whose shank may be threaded, as at e, to engage thethreads of the stock. In the lower surface of the tool-stock is a groovef at right angles to the movement of the stock. The rotatable shaft Gbears on its upper end'a disk H, having an eccentric-pin h, which entersthe slot f of the tool-stock. The pin h has a loose collar 71, thereon,which can be replaced to take up wear and reduce the friction.

From the above description it will be apparent that the rotary motion ofthe shaft will be converted into a right-angled reciprocating Inotion ofthe tool-stock, and hence the engine will be adapted for use with aplugger, saw, file, emery strip, or other tool where a reciprocatingmotion is desired.

We do not limit our invention to the pre` cise mechanical details, asthe construction may be varied without departure from the principleherein shown. For example, the tool-stock may have the eccentric-pinsecured to the lower surface thereof, and the groove Inay be formed inthe disk or in the end of the rotating shaft, or instead of the disk theshaft may bear a simple crank-arm. The construction shown in thedrawings, however, is preferable, because the disk operates to steadythe shaft in its rotation.

IVe claim- In an angle attachment for dental engines, the combination,with a hand-piece having a cylindrical casing, of a shaft rotatablymounted within said casing, a disk on the end of said shaft bearing aneccentrically-placed pin on its upper surface, a removable head-blockhaving a threaded connection with the casing of the hand-piece, waysformed in its outer end at right angles to the hand-piece, and atool-stock adapted to slide in said ways and having a slot in its lowersurface into which the eccentric-pin projects, whereby the rotaryInotion of the shaft is converted into a rightangled reciprocatingmotion of the tool-stock, substantially as described.

FRANK FLEURY. ALBERT G. GOODMAN. IVitnesses:

FREDERICK C. GOODWIN, N. M. BOND.

